Valve structure.



H. WHITE.. VALVE STRUCTURE. APPLICATION FILED AUG.17,1907.

Patented' Mar. 16,' 1909.

....urrr. uw.

HENRY WHITE. OF MARION, OHIO.-

VALVE STRUCTURE.

Specification o! Letters Patent.

Patented March ie, iena Application tiled'migust-H', 1907. Serial'No. 389,008.

To al? whom 'it may concern.'

Be it known that I, HENRY WHITE, a citizen of the` United States, resident of Marion, county'of Marion, and State of Ohio. have invented anew. and useful' Improvement in Valve Structures, of which the following is a specification, the principle cf the invention bein herein explained and the best mode in whic .I have contemplated applying' that ioprinciple, spas to distinguish it from other inventions.

My invention relates to valve structures,

itsobject being to provide means whereby the leakage between a valve and its seat may be'corrected.

ture wherein are provided means for periodically-rotating the valve about its axis so as to bring valve and seatinto different contact positions, thereby correcting any slightleakages which may have-existed., In case such leakages are serious and cannot be overcome by the mere changing ofv the relative posi!- tions of the valve and seat the rotatin movement may be continuedand extended into a grinding movement, the valve being groundinto thel seat bysuch operation.

' The invention consists" of means hereinafter.describedv and particularly set forth in the claims` .The annexed drawing and the following description set forth in etail, certain mechanism embodying the invention, the disclosed means constituting but one of various mechanical forms in which the principle of the invention may be applied.

In said annexed drawingz-Figure 1 represents a vertical section of the valve em-v bodying my invention, certain parts cut by the plane of section being shown in elevation. Fig. 2 re resents'a detailed plan of the to of the va ve structure shown in Fi 1.

Re erring to the structure illustrate in Fig. 1: A is a valve casing of ordinary structure and provided with a valve-seat a.

a which 1s engaged by a To this end I have provided a valve struc-A that by rotating the hand wheel b the valve The seat casing is furtherprovided with an,

'be readily understood, the compressed fluid y which the valve controls furnishing the neces- Wheel b by means of which said member may be'turned andtherefore caused to project into or withdraw from the interior el the casing, as will be readily understood. eo The upper extremity of member B is cut ofi? flush with the outer surface of the hub of the handwheel as shown. Loosel'y mounted in the` bore of the hollow member B; is a valve-stem B 'whose lower end is either e5 fixed to the valve-B2 or made integral there with. The upper-end' of this stem project-a5 squared as at b2. Uponxthis s uared portion. is removably fitted-a cap b3 which is provided with a squared outer surface for receiving a Wrench or removable handle C. This cap is securedl against displacement from the stem B by a screw D whose head is larger in diameter than the squared end b2 of said stem. This head is however made of adiameter sufficiently small as not to prevent the handle C from being readily slipped over it. The valve B2 is provided'with a boss b5 of frusto-conical form and its upper surface is lin engagement with the lower surface of the portion b of member B, as shown in the drawing.

From the above construction it will be seen may be seated and un-seated as in an ordinary valve structure. It will however be further noted that by means of the handle C or a wrench applied to the cap b3, the stem and valve attached thereto may be rotated about their axis independently of theun-seating and seating mechanism. When a valve has been in use for some time and particularly vunder heavy pressure, small leakages occur bet-Ween it and its seat, due to the formation of small grooves or recesses in the valve surfaces. When such leakages occur and become of sufficient degree to materially inter-- fere 'with the efliciency of the struct-ure, the valve is turned by means of the handle C or a wrench, as previously described, and the relative positions oi' the valve and seat are therebychanged so as to bring other points of the surface into .contact with each other. Where the leakages are small such turning will correct them. If howevei the grooves are vdeep and the leakages are serious, the

valve andseat may be ground into each other by a continued turning ofthe stem B', as will sary pressure vfor this operation. Leakages' between the surfaces of the member B and the boss b are similarly corrected and when serious may .also be ground into each other by the previously described turning operation, as willbe readily-understood.

The cap b3 held in place rby the screw prevents displacement 'of the stem'B with reference to the member B, at the same time permitting it to rotate'v at all times-with refer- Other modes of a plying the principle of ence to the latter.'

y my invention may e employed, instead of 4 the one explained, and change may be made hollow member having screw-threadedl enagement with said casing, said hollow mem er projecting into the latter and having iis outer extremity provided with a hand-wheel ixedly secured thereto; a valve member comprising a valve and stem therefor, the

Alatter being seated in lsaid hollow member A and rotatable therein, the outer extremity of said stem projecting above said hand-wheel;

a cap secured to said projecting extremity and formed Iwith a squared surface for receiving a vwrench or crank; and means for removably;

' into the latter, the 'outer end of said hollow member being provided with a hand-wheel ixedly securedthereto; a valve member comprising an integral valve and stem, the latter being mounted in and rotatable in said hollow member; the outer end of said stem projecting above said hand-wheel,` and provided with a squared portion; a cap seated on said squared portion and also formed with a squared portion for receiving awrench or crank; and a screw for securing said cap in place; said capadapted to prevent' longitudinal displacement of said stemin said-hollow member but arranged to permit of the rotation of said stem in the latter.

- Signed by me, this l8 day of August, 1907.

I HENRY wi-nm attested by- JENNiE E. GARY, LENA A. Diigjnfxiu. 

